An electrically heated towel rail has been operating for several hours. The conditions in its surroundings do not change. During a measurement interval, thermometer readings show that the temperature of the rail remains constant. An energy meter records that 36 kJ is transferred electrically to the rail during this interval.
Which statement is correct?
Less than 36 kJ36\ \text{kJ}36 kJ is transferred from the rail to the surroundings.
Exactly 36 kJ36\ \text{kJ}36 kJ is transferred from the rail to the surroundings.
No energy is transferred from the rail to the surroundings.
More than 36 kJ36\ \text{kJ}36 kJ is transferred from the rail to the surroundings.
105 exam-style questions on Edexcel GCSE Physics 10.3 Electrical energy and power, covering 10.3.1 The heating effect of an electric current, 10.3.2 Reducing energy transfer in wires, 10.3.3 Advantages and disadvantages of the heating effect, 10.3.4 Energy transferred by an electrical circuit, 10.3.5 Electrical power, and 10.3.6 Energy transfers in domestic devices. Each one has a worked solution and a mark scheme showing where the marks go.